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Agisoft Metashape tutorial (Basic workflow)

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all right so we're going to do a quick

video kind of describing the workflow in

a G soft métis shape here before you

have got a folder where I have some of

the projects I've been working on and

we're going to open up this one here

called neck sitio glyph and as you can

see inside of that folder I've got a

three folder structure one of them that

says photos another one output and the

other one says export and so what you

want to do to get started is take all

your photos of the object for

photogrammetry and dump them into here

so you will likely have raw photos and

JPEGs all in one to go ahead and dump

both of them in here in their photos

folder so now what you want to do is

create an Adi soft project so you can

just open up a G soft and once it's open

you can go ahead and hit file save as go

and find that place where you're going

to save it mine was the next C to a

cliff and you want to save it here in

the output folder so I already have one

saved from before I'm gonna go ahead and

save a different version here alright should

should

here in the top left and we're ready to

get started so the first things first

identify this tab up here called

workflow in the workflow tab when you

click it it has all the things necessary

that you would need in order to put

together a 3d model using photos

including where to start

so we're going to go ahead and click

here at add photos and we're going to

search for that photos folder and we're

gonna have to we're going to want to

take every single photo that you took in

the field so we'll hit ctrl a ctrl a

just allows you to highlight everything

and then hit open and you'll see them

populate in the photos pane in add you

soft so I can see them over here if I

want to inspect my photos within the

software all you have to do is give it a

couple click and then you can use the

mouse scroll to actually zoom in and out

to check different parts of your your

image to see if you have a good photo or

a bad photo another trick is to

right-click your photo and then go to

where it says estimate image quality and

you can actually have the computer

estimate the image quality for all of

your cameras by doing that it'll give

you a value between zero and one and

typically you want something above the

threshold of 0.5 to be a good photo so

just a little tip there to get started

go ahead and close that out hit workflow

align photos this is the first step and

you want to get all these photos aligned

to recalculate that geometry basically

it's going to look for key points and

tie points in every single image trying

to match them to other images so it can

get rolling we're going to leave it in

high and anytime you do an alignment my

advice is just to have it on high

generic pre selection is just fine and

then you could theoretically go ahead

and hit OK with all the default settings

if you ever want to play around with

those you just click here and advanced

open up key point limit and tie point

limit you can change these values around

a little bit and my advice would be to

get on the agile soft meta shape manual

and look up what these things mean and you

you

you will be able to kind of make some

judgment calls as to how you might want

to change those numbers around alright

let's just go ahead and hit OK and I'll

run a photo alignment okay looks like we

finished our photo alignment here and we

have all of our photos aligned if you

just kind of click here in this little

transparent ball you can spin things

around this is kind of a little tumbler

for you to navigate in 3d space the

other control you want to get used to is

the middle mouse button clicking it down

and dragging this is how you pan the

model from side to side zooming is just

scrolling with the mouse scroll and then

of course tumbling right and then the

last thing is if you for some reason the

models like well here and your tumblr

swinging it around like this just double

click the model and it puts it right

there in the center of your tumblr so

you can kind of reset the navigation so

looking at the images it looks like we

have good coverage right in here I took

a few context shots back here but you

can actually see the side of the wall

forming you know it's kind of a zig zag

and this I was very focused on this

glyph that was on a stone here and built

into the side of the wall so this is

typically where you say okay I've got a

successful photo set that has been

aligned and the rest of it is likely to

be a good model so as long as you can

see the general image or the general

shape of the feature that you're trying

to take it's usually a success so the

next step which is actually by the way

if you are trying to get these little

cameras to come up so you can see the

camera positions you toggle this on and

off where it says show cameras and

that's what makes that appear if you're

just getting blue tiles with no image on

the back and you want the images then

you just hit the down arrow click on

show thumbnails and that toggles on the

image to the back of the camera position

so the next step I'm going to turn these

off would be to create a dense cloud

again you go back to your workflow tab

click on dense cloud and you've got a

few choices to make here

I would just leave it on default for now

and run what you have there on low low

is just gonna save a little bit of time

but it will make it will create less

points on the object itself but if you

want to test some out some more dense

clouds you can put in you know medium or

high it's just going to put more points

on the surface of your object that a

little later be interpolated into a mesh

so we're going to hit low and we're

going to go ahead and hit change depth

filtering to aggressive and we're going

to hit okay alright I don't know how

long you waited but a with the magic of

videos and online videos I was able to

kind of have it go right to the dense

cloud here as you can see there's a lot

of points now on the surface and when i

zoom out you can definitely see your

object there is probably some extraneous

points that could be cut away to kind of

improve your model so at this point you

can start making some decisions as to

what you what you actually want to

delete so over here next to the little

arrow icon is your selection tool which

I tend to use the freeform selection and

you drop that down click on freeform and

that way you have a little lasso do that

so you can actually lasso groups of

these points and then just hit the

Delete key and it gets rid of them that

way it doesn't affect your model in any

way so I know I want to get rid of all

these points so I'll get my lasso out of

all of those delete nice looks a little

bit better maybe I don't want the top of

this so I just kind of swing the lasso

around and hit delete and bottom looks

good I'll just leave it the way it is no

the tumblr ball is gone and you may be

trying to move this around and visualize

it differently but there's just a

selection tool and you have to keep in

mind you have to switch back to the

tumblr which is this little arrow here

and now the ball is back in

in there to deselect I get usually what

I do is I just grab a selection tool and

select off the model and it gets rid of

the pink selection and then I go back to

your little arrow okay our next step

here is to go to workflow again and go

to build mesh click on that we're gonna

get another dialog reminiscent of what

just happened there with the dense cloud

and in the dialog it's going to ask you

what you want to interpolate what's the

source data and we're going to choose

dense cloud since that's what we just

created leaving everything there and

default except think a little bit more

about how many polygons you want to

create your model and you'll see what I

mean just a second what what I mean by

faces or polygons for a 3d model I'm

gonna go ahead and choose medium and I'm

going to click OK and it'll it'll skip

to the mesh it looks like we're almost

done there we go got the mesh over here

and new visualization tools up top you

know you have your sparse cloud your

dense cloud tool or visualization and

then you have a mesh visualization that

shows up as a little green triangle when

you click that you'll notice that it has

become solid it's no longer points so

you can zoom in and it looks kind of

distorted what you're looking at is a

colorized mesh or shaded mesh if you

drop this down you can look at it solid

to see what the geometry looks like you

can also look at it as a wireframe and

when you look at the wireframe you see

kind of what I was talking about with

polygons or faces but you have multiple

triangles that are just kind of you know

put together to create the 3d geometry

of the object itself down here in the

bottom left you can see how many faces

are actually making up the object and

here we have 60,000 the higher that

number the more definition you're going

to see in your object but also the

longer it's going to take to compute so

the next step here if we if we were

happy with what we see and we don't want

to edit anymore I'm just going to edit

I'm going to get the freeform tool and

I'm going to kind of straighten up the

bottom here

and hit delete alright we're gonna save

my progress once we're ready to move on

we'll go back to the workflow tab we'll

go to build texture which is our final

step and to be honest with any sort of

object or feature that's fairly you know

good size too small you can just leave

everything on default here and just hit OK

so now what it's going to do is take all

of your photos and find the best photos

for the job to actually wrap and create

a photorealistic texture wrapping the

photos around the 3d object and so it's

going to recalculate and stretch these

images to work around the geometry there

so we'll wait on that alright so your

texture finally finished processing and

now you are looking for it and it's

nowhere to be seen you might have to

actually activate it up here where you

kind of click down the green pyramid

your mesh and you click on the textured

mesh actually showing the texture

wrapped around the mesh so click it

sometimes it'll take a little while to

pop up because it takes it you know for

some reason it's computationally heavy

and takes a little while to actually

visualize there but you know once it's

done hopefully you'll be happy with the

results of what you have there when you

have your photo realistic texture

wrapped around the mesh so you can see

our little Zapotec guy Dixie Joe okay

last step here is to actually export

your model so you can visualize it maybe

in another software or give it off to

another researcher we what you have to

export model click that decide where you

put it remember the three folder

structure put it in the export folder

and we will just call it whatever we

want here I'm going to call it an xhr

cliff and you can choose what kind of 3d

model you want to export typically that

Adobe PDF is fairly shareable between

people the kind of a default or a

standard format to export in would

actually be obj

let's click obj and let's save I had it

already exported so it's just asking if

I want to replace it I'll go ahead and

say yes then we have the dialog that

pops up here what I typically will do is

switch my JPEG texture to PNG texture

everything else I'll leave in default

and just hit OK so now it's exporting

your model and if you open up your

actual folder folder where you have the

three folder structure you go to your

export what you'll find in there are a

set of files now typically I have a few

more files in here because this is

another project I was working on but

typically it'll just be three files

you'll have your obj MTL and whatever

image file you decided to export in and

PNG in this case so if you decided to go

with jpg it'll be a jpg file so at

minimum with this obj you're gonna have

three files obj MTL and whatever the

texture is and later on when you kind of

get more advanced with the texture

dialog you might actually create more

texture files to where you might have to

five ten forty in order to improve

resolution on much larger objects so but

that's basically it from start to finish

using your workflow tab to kind of work

through the different steps in the

workflow in photogrammetry the final

thing I want to mention here is that

between the align phase

in the building your dense cloud to

improve and the calibration in between

your cameras after the alignment you can

go in here to tools click optimize

cameras and just hit OK what that's

going to do is just use the metadata

from all of your photos which is

automatically detected and it's going to

use that to optimize the alignment of

all of your cameras before you move on

with the workflow so I would suggest

making that part of your standard

workflow where you go from your

alignment phase after the initial

alignment and doing a optimize cameras

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